Machine for drying starch refuse and other substances



(No Model.)

W. DURYEA.

MACHINE FOR DRYING STARCH REFUSE AND OTHER SUBSTANCES. No. 2514847. Patented Jan. 3,1882.

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STATES PATENT OFFICE.

WRIGHTiDURYEA OF GLENMGOYE, NEW YORK.

MACHINE FORDRYING 'STARCH REFUSE AND OTHER SUBSTANCES.

- SPECIFICATION forming part of Letters Patent No.,251,847, dated January 3, 1882.

' Application filed December 29, 1880. (No model.)

To all whom it may concern:

;.;B'e-' it ikHOWIl" that I, WRIGHT DURYEA, of Glen=Cove,"in theicounty of Queens andState of :Newv York,have invented certain new and 5wuseful Improvements in Machines for Drying fitarch Refuse and other Substances, of which it the followip g is a specification. Although my invention may be applicable to machines for drying various vegetable sub- Ioestance's,itis particularly intended for drying the wet refuse fromstarch-factories. This ref- :useahas-heretofore"been soldby starch-.manu-- facturersat a very I Wpriee because of the necessity of getting rid of it before its souring; and itheobject ofmy invention is to provide amachinefiwhich may beiused advantageously forg-idryiingethis substanceythus enabling it to :bestored for some time without danger of souring or fermentationiandidisposed of to better zowadivantage.

l TOlthlSEGIld' myinvention consists essentially in?theecombination,in adrying-machine, of an uprighttrunk or cylinder divided at dili'erent l. heights 'by hollow floors, pipes for supplyinga 2 5 -T heatinga gent tosaid floors, anupright hollow, "rotary; shaft,blades orscrapers rotating with said-i shaft above said floors for distributing qma'terial upon said floors and discharging it through openingsinsaidfloors,perforatedpipes o projectings-radiallysfrom said shaft above said wfloors, and means for forcing air through said shaft and pipes. l

The invention also consists in the combination of the;upright trunk or cylinder having 5 hollowifloors withdischarge-openings through +tliem,the upriglithollowrotary shaftand radial perforated :pipes projecting therefromabove I each floor, and means for forcing air through .saidxsliaft and pipes. .The invention also consistsin various com lbinatio'ns of partsand details of construction,

hereinafter described, whereby the effectiveness of the machine is increased,including thfe icombinationywith the aforesaid hollow shaft,

5 0f hopper-boys'*for distributing material tupon the -floors of the trunk or cylinder above descr-ibed, composedaof perforated pipes proje'cting from said'shaft and bladesor scrapers attached to'jsaid pipes. 5o? In/the accompanying drawings,Figure 1 rep- ;iresents-a centralqvertical section of amachine (embodying my invention. Fig.2 represents a similar section at right angles to Fig. 1. Fig. 3represents a horizontal section upon thedotted linew m, Fig. 1; andFig. 4 represents a central vertical section of a portion of the upi right shaft and a hopper-boy upon a somewhat larger scale; 7 Similar letters of reference designate corresponding parts in all the figures.

A designates an upright trunk or-cylinder closed at the top and divided at difl'erent heights by horizontal floors BB, which are made hollow, and to which steam, hot air, or

other heating agent, but preferably steam, is introduced by means of inlet-pipes a, and from -whicl1 saidsteam is exhausted through outlet- .pipesln Thesaid two hollow heated floors formtwocompartments or chambers; but the trunk or cylinder may be of any suitable height r and divided by any number of floors, to suit the characterof thesubstance to be dried.

G designates a hopper at the top of the trunk or cylinder A, through which the sub stance to be dried is introduced, and by which said substance is delivered at or near thecen ter of the upper hollow heated floor, B, and

the upper and lower floors, B B, are each provided with one ormore delivery openings or chutes, 0, through which the substance in process of drying is successively delivered. From the lower floor, B, the substance in process of drying is delivered throughthe opening 0 into a third compartment, D, provided with a steam-jacket, D, upon the side and bottom,

and said steam-jacket is supplied with steam by a branch, at, from the inlet-pipe'a, and is exhausted of steam by abranch, b, communieating with the outlet-pipe b.

E designates an upright shaft arranged centrally within the trunk or cylinder A, and

supported in a bearing, 01, in the top head E and F are connected by bevel-gear wheels ff,and through the said wheels the shaft F imparts its motion to the shaft E,

i To the shaft E, above the hollow floors B B,

are fixed hopper-boys G G, by which the material on each floor is delivered through the opening 0 therein and discharged into the compartment or chamber below. The hopper-boys G G are each composed of four pipes, g, fixed radially in the shaft E, and having extending downwardly from them blades or scrapers h, which scrape upon the floor and throw the substance upon the floor outward from the center. As most clearly represented in Fig. 3, the blades h are not continuously straight, but are cut transversely, and the outer ends of the portions thus formed are all deflected or bent inward beyond the inner ends of the following portions.- This construction provides for each portion of each blade throwing the substance upon the fioor outward a distance equal to its length, and then leaving the substance to be taken up by the next blade. The substance being dried is thereby left in contact with the floor for a longer time and becomes more thoroughly dried than if discharged at once.

The shaft E, as clearly shown, is hollow, amd in the lower portion thereof below the compartment D are perforations 2', through which air may pass upward through said shaft and the pipes gof the hopper-boys and out into the compartments above the fioors B B, through perforations j in the lower sides of said pipes. The supply of air forced upward through said shaft may be produced by afanblower, H, or other desirable means, and may be exhausted from the chambers or compartments through openings .9 in the side of the trunk or cylinder.

As above stated, the delivery-openings 0 through the floors B B are near the circumference of the trunk or cylinder A, and in order to deliver the partly-dried substance discharged through said opening in the floor B at a point near the middle of the fioor B, I

,may employ a screw-conveyer, I, arranged in a casing below the fioor B, and taking the substance delivered to it through the opening 0, and delivering it at its inner end near the shaft E. The screw-conveyer I is rotated by bevel-gears it from a shaft, J, which is ar ranged vertically upon the exterior of the trunk or cylinder A, and itself derives motion from the shaft F by means of bevel gear wheels l. A second conveyersimilar to I might be arranged below the floor B; but in lieu of these conveyers a hopper might deliver the substance from the circumference of one floor to the center of the floor next below it.

In the bottom of the compartment 1), near its circumference, are delivery chutes or pipes K, (best seen in Fig. 2,) and upon the shaft E, above the bottom of said compartment, is a third hopper-boy, G comprising perforated pipes g and blades h, by which the substance,

, now thoroughly dried, is thrown outward to the delivery chutes or pipes K.

The substance to be dried is introduced through the. hopper O in a wet or moist condition, and, falling upon the hollow heated floor B, is by the hopper-boy G spread over the fioor in a thin layer, and gradually and slowly moved outward from the center and delivered through the opening 0 to the conveyer I. By said conveyer the partly-dried substance is delivered near the center of the floor B and further dried, it being gradually moved outward and discharged through the opening 0 into the steam-jacketed compartment D, from which it is finally delivered through the chutes or pipes K thoroughly dried and fit to be stored for a longer or shorter period without danger of heating or fermentation.

The hopper-boys, instead of having-their arms formed by the pipes g, as shown in the drawings and hereinabove described, may be made separate from the said pipes and placed between the said pipes, being attached either to the said pipes or to the shaft E in such manner that they may be free to rise and fall autoto secure .by Letters Patent, is

1. The combination, in a drying-machine, of an upright trunk or cylinder divided at different heights by hollow floors, pipes for supplying a heating agent to said hollow floors, an upright hollow rotary shaft, blades or scrapers rotating with said shaft above said floors for distributing material 'upon said floors and for discharging it through openings in said floors, perforated pipes projecting radially from said shaft above said floors, and means for forcing air through said shaft and pipes, substantially as and for the purpose specified.

2. The combination, in a drying-machine,of anfupright trunk or cylinder, divided at different heights by hollow floors having in them discharge-openings, an upright hollow shaft, perforated pipes projecting radially from said shaft, above each floor, and means for forcing air through said shaft, and perforated pipes, wherespecified.

4. The combination, in a drying-machi'ne,0f an uprighttrunk or cylinder divided at different heights by hollow floors havingin them discharge-openings, pipes for supplying a heatiug agent to said hollow floors, an upright hollow rotary shaft, and pipes projecting therefrom for supplying air between said' floors, blades or scrapers rotating with said shaft 6. Thecombinationofthehollowrotaryshaft r 5 E, and hopper-boys, each comprising perforated pipes g, and blades or scrapers h, cut or slit transversely, and having the outer ends of the portions between the slits bent or deflected, as described, so that said portions 20 stand at an angle to said pipes, substantially as specified.

WRIGHT DURYEA.

Witnesses:

GEORGE GLOVER, O. N. PAYNE. 

